
class FilePath:
    def __init__(self, parent, child):
        self.parent = parent
        self.child = child

    def key(self):
        return "parent , child"

    def __str__(self):
        return "{0} {1}".format(self.parent, self.child)

class TestData:
    def __init__(self):
        self.id = 1
        self.name = "name"

    def key(self):
        return "id"

    def __str__(self):
        return "{0} {1}".format(self.id, self.name)
